Coupling arrangement



Feb. 10, 1931.

FREQUENLIES F All/0 f M. LATOUR COUPLING ARRANGEMENT Filed Jan. 21, 19252 Sheets-Sheet 1 INVENTOR Feb. 10, 1931. M. LATOUR 1,791,965

COUPLING ARRANGEMENT Filed Jan. 21, 1925 2 Sheets-Sheet 2 SOURCE OFFREQUENCIES.

F mvn SOURCE 0F FKEQZ/EA/[IES F AND f INVENTOR Patented Feb. 10, 1931NI-TED STTES PATENT OFFICE MABIUS LATOUR, OF NEW YORK, N. Y., ASSIGNORTO LATOUR CORPORATION, OF JERSEY CITY, NEW JERSEY, A CORPORATION OFDELAWARE 'GEMENT Application filed January 21, 1925, Serial No. 3,786,and in France June 22, 1924.

My invention relates to coupling arrangements and particularly tocoupling arrangements between the output and input of electron devicesin which a plurality of different frequency waves are amplified ordetected or both.

One of the principal objects of my invention is the improvement of theinventions disclosed in French Patent #512,295 and addition#21,855-thereto of November 10th, 1916.

Another object of my invention is the incorporation of various featuresdisclosed in the above mentioned patent and in addition thereto in thisapplication.

Other objects and advantages of my invention will be apparent from thefollowing 'description taken in connection with the accompanyingdrawings in which:

Figure 1 is a schematic diagram of one modification of my invention.

Figure 2 is a schematic diagram of another modification.

Figure 3 is a schematic diagram of another embodiment of my invention.

Figure 4 is a schematic diagram of still another modification.

Figure 5 is a schematic diagram of yet another modification.

Figure 6 is a schematic diagram of still another modification.

.Referring to Figure 1, the'grid-filament circuit of electron device 1is connected across the source of frequencies F and f. The platefilamentcircuit of electron device 1 comprises a reactance coil 2 or autotransformer, a reactance coil 3 and a source of power all connected inseries and arranged as shown. The upper extremity of reactance coil 2 isconnected to the grid of electron device 4 through a coupling condenser5. A coil 6 is inductively coupled to the coil 3 and has its upperextremity connected to the upper extremity of coil 3 through a condenser7. The magnetic circuit of coils 3 and 6 preferably comprises magneticmaterial. The lower extremity of coil 6 is connected to the filament ofelectron device 4. A discharge resistance A coil 15 is inductivelycoupled to coil 12, its lower extremity being connected to the lowerextremity of coil 12 through a con denser 16. The upper extremity ofcoil 15 is connected to the filament of electron device 13 as shown.

Referring to Figure 3, the primary winding of coupling devices 20 and 21are connected across a source of frequency F and are preferablyidentical. The primary winding of coupling device 22 is connected acrossa source of frequency f as shown. The magnetic circuit of couplingdevice 22 preferably comprises magnetic material.

The secondary winding of coupling devices 20, 21 and 22 are allconnected in series, the secondary winding of coupling device 22 beinginterposed between the other two windings. The upper extremity of thesecondary winding of coupling device 20 is connected to the controlelectrode of triode 23 while the lower extremity of the secondarywinding of coupling device 21is connected to the control electrode oftriode 24. The filamentary cathodes of the triodes are connected inparallel. A connection is made between one of said parallel connectionsand substantially the midpoint of the secondary winding of couplingdevice 22.

" The anode-cathode circuit of triode 23- comprises the primary windingsof coupling device 25 and preferably 'a half of the primary winding ofcoupling device 26 and a source of power 27, all connected in series asshown.

The anode-cathode circuit of triode 24 comprises the primary winding ofcoupling device 27 and preferably the other half of the primary windingof coupling device 26 and a source of power 28.

It is obvious that the above-described system is in eflect a push-pullamplifying system in which two different frequencies are amplified.

Referring to Figure 4 the control-electrode-cathode circuit of triode 30is connected to the source of frequencies F and f. The anodecathodecircuit of triode 30 comprises a reactance coil or auto-transformer 31,a reactance coil or auto-transformer 32 and a source of power 33, allconnected in series and arranged as shown. Coil 31 is for the higherfrequency F while coil 32 is for the lower frequency f. The magneticcircuit of coil 32 preferably comprises magnetic material.

The upper extremity of coil 31 is connected to the control electrode ofelectron device 34 through a condenser 36 as shown. A dischargeresistance 37 is connected as shown. The cathode of triode 34 isconnected to the terminal of the source of power 33.

Referring to Figure 5, the control-electrode-cathode circuit of triode40 is connected across the source of frequencies F and f as shown. Theanode-cathode circuit of triode 40 comprises a coil 41 for the lowerfrequency f, a coil 42 for the higher frequency F, and a source of power43 all connected in series and arranged as shown. The upper extremity ofcoil 41 is connected to the upper extremity of coil 44, the lowerextremity of coil 44 being connected to the control electrode ofelectron device 45 through the condenser 46. The coil 44 is inductivelycoupled to the coil 41, the magnetic circuit of said coils preferablycomprising magnetic material.

The upper extremity of coil 47 is connected to the upper extremity ofcoil 42 through condenser 48, the two coils being inductively coupled.The lower extremity of coil 47 is also connected to the controlelectrode of electron device 45 through the condenser 46. Attention isalso called to the-fact that the device comprising coils 41 and 44should be so insulated and arranged as to substantially prevent anycapacity coupling between said device and the source of power 43.

Referring to Figure 6, the control-electrode-cathode circuit of triode50 is connected to the source of frequencies F and f. The anode-cathodecircuit of triode 50 comprises a coil 51 for the higher frequency F, acondenser 52 and a source of power 53 all connected in series andarranged as shown.

The upper extremity of coil 51 is connected to the control electrode oftriode 54 through a condenser 55. A shunt circuit comprising reactancecoil 56 and the primary winding of transformer 57 is connected acrossthe upper extremity of coil 51 and the lower plate element of thecondenser 52. The secondary winding oftransformer 57 is connected to thecontrol-electrode-cathode circuit of triode 54 through the reactancecoil 58. The transformer 57 preferably comprises a magnetic circuit ofmagnetic material.

In all of the above-mentioned systems the frequencies F and f aresupposed to represent comparatively high and comparatively lowfrequencies, respectively. However it is to be understood that thesefrequencies may be close enough together if desired to insure thesuccessful operation of the various systems.

\Vhile I have shown and described various preferred modifications of myinvention, I do not limit myself to the same; but may employ such othermodifications as come within the spirit and scope of my invention.

I claim:

1. In combination, a first electron device comprising an anode, acathode and a control electrode, a second electron device alsocomprising a cathode, an anode and a control electrode, a source ofdifferent frequencies, means for connecting the control electrode andcathode of said first electron device across said source of differentfrequencies, a plurality of reactance coils connected in series acrossthe anode and cathode of said first electron device, a connection fromthe upper terminal of one of said coils to the control electrode of saidsecond electron device, a secondary coil inductively related with theother of said coils, a connection from one extremity of said secondarycoil to a terminal of said other coil, and a connection from the otherextremity of said secondary coil to the cathode of said second electrondevice.

, 2.'In combination, a first electron device comprising an anode, acathode, and a control electrode, a second electron device alsocomprising an anode, a cathode, and a 0011 trol electrode, a source ofhigh and lower frequencies, means for connecting the control electrodeand cathode of said first electron device across said source offrequencies, a plurality of reactance coils, one of which is operativeat high frequencies and the other at lower frequencies, connected inseries across the anode and cathode of said first electron device, aconnection from the highvoltage terminal of said high-frequency.

coil thru a capacity to the control electrode of said second electrondevice, a secondary coil inductively coupled to said coil operable atsaid lower frequencies, a connection from one extremity of saidsecondary coil to a point intermediate said two first-mentionedreactance coils, and a connection from the other extremity of saidsecondary coil to the cathode of said second electron device.

MARIUS LATOUR.

